BMW 5251 Service Manual page 285

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Camshaft Timing chain1
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Remove camshaft locking tools from rear of camshafts
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Remove BMW special tool 11 4 220 (adjustable primary
chain tensioner). Reinstall primary chain tensioner.
Tightening torque
Primary chain tensioner to cylinder head 70 Nm (52 it-lb)
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Remove crankshaft locking tool from transmission bellhous-
ing. Reinstall sealing plug.
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Remove VANOS setup bracket from front of cylinder head
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lnstall VANOS control unit as described earlier in this group.
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Remove compressed air fitting (BMW special tool 11 3 450)
from VANOS control unit.
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Fit VANOS oil line banjo bolt with new seals. Attach oil line to
VANOS control unit.
Tightening torque
Oil line to VANOS control unit (banjo bolt) 32 Nm (24 H-lb)
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Remainder of installation is reverse of removal, noting the fol-
lowing:
lnstall spark plugs.
* lnstall intake camshaft plastic baffle prior to installing cylin-
der head cover. lnstall ignition coil packs and connect elec-
trical harness connectors.
Install radiator cooling fan.
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lnstall air filter housing and top engine cover.
Tightening torque
Radiator cooling fan (VISCOUS clutch) to 40 Nm (30 ft-lb)
coolant pump
Cyitnder head cover to cylinder head 10 Nm
(89
in-lb)
Sparlc plug to cylinder head 25 Nm (18 ft-lb)